2578078 has 4 divisors (see below), whose sum is σ = 3867120. Its totient is φ = 1289038.

The previous prime is 2578061. The next prime is 2578087. The reversal of 2578078 is 8708752.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 644518 + ... + 644521.

It is an arithmetic number, because the mean of its divisors is an integer number (966780).

2^2578078 is an apocalyptic number.

2578078 is a deficient number, since it is larger than the sum of its proper divisors (1289042).

2578078 is a wasteful number, since it uses less digits than its factorization.

2578078 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1289041.

The product of its (nonzero) digits is 31360, while the sum is 37.

The square root of 2578078 is about 1605.6394364863. The cubic root of 2578078 is about 137.1193305584.

The spelling of 2578078 in words is "two million, five hundred seventy-eight thousand, seventy-eight".